ARTICLES

Filter  
Active filters 0
Remove
  

Refine your searches by:

Collections
Social Sciences
Education
Research
Languages
Economy
Literature
Technology
Religion
Environment
Agronomy and forestry
all records (72)

Languages
English
Spanish
Portuguese
German

Countries
Indonesia
USA
Brazil
South Africa
Ukraine
Spain
Italy
Denmark
Germany
Switzerland
all records (80)

Years
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
all records (24)

Filter  
 
172.858  Articles
1 of 17.287 pages  |  10  records  |  more records»
This paper investigates an improved noise reduction method and its application on gearbox vibration signal de-noising. A hybrid de-noising algorithm based on local mean decomposition (LMD), sample entropy (SE), and time-frequency peak filtering (TFPF) is ... see more

Compared with the strong background noise, the energy entropy of early fault signals of bearings are weak under actual working conditions. Therefore, extracting the bearings’ early fault features has always been a major difficulty in fault diagnosis... see more

In this paper, we give some characterizations of the left and right generalized Drazin invertible bounded operators in Banach spaces by means of the single-valued extension property (SVEP). In particular, we show that a bounded operator is left (resp. rig... see more

Due to the weak entropy of the vibration signal in the strong noise environment, it is very difficult to extract compound fault features. EMD (Empirical Mode Decomposition), EEMD (Ensemble Empirical Mode Decomposition) and LMD (Local Mean Decomposition) a... see more

In this paper, a matrix-free posterior ensemble Kalman filter implementation based on a modified Cholesky decomposition is proposed. The method works as follows: the precision matrix of the background error distribution is estimated based on a modified Ch... see more

The purpose of this study is to describe the differences in the concept of meaning between the translation of the Qur'an in the Indonesian and Malaysian versions and explain the factors that influence the differences in the concept of meaning. This is a q... see more

Physics learning in SHS demands the fulfilment of 4 core competencies, namely spiritual, social, knowledge, and skill. Therefore, it takes a variety of creative activities and meaningfull learning. One of them is by integrating local potential in physics ... see more

The magnetic field satellite data are usually referred to geocentric coordinate reference frame. Conversely, the magnetohydrodynamic waves modes in magnetized plasma depend on the ambient magnetic field, and is then useful to rotate the magnetic field mea... see more

1 of 17.287 pages  |  10  records  |  more records»